He wrote something about his wallet needs a verification from his smartphone. Does Armory support 2FA maybe? It might be an explaination for why the coins didn't move. Of course only when you want to take his story.
if the private keys were compromised, which, if this story is true, they should be considering the signed message linked in my quoted post, the hacker wouldnt need any sort of 2FA to move the coins. the private keys would give a hypothetical hacker full control of the coins regardless of whatever security measures armory provides.
Though only one thing can be possible. Either the private keys are compromised and the "hacker" can sign message AND withdraw the funds or the funds are out of reach for the hacker and the private keys are NOT compromised.
I think the only storyline without inconsistencies is that master-P made an exit scam and wrote all of this himself or he lost the private keys and can't reclaim the bitcoins and he had the stupid idea to try getting out of this.
He might have thought he might be able to avoid paying back of the escrowed funds. Maybe now, when he slowly realizes his stories have too many holes, he gives in and claims he will pay back slowly.
All speculation at this point unfortunately.